C++ (Cpp) XDRChars示例

示例#1

文件： jsxdrapi.c 项目： 2812140729/robomongo

JS_XDRString(JSXDRState *xdr, JSString **strp)
{
    uint32 nchars;
    jschar *chars;

    if (xdr->mode == JSXDR_ENCODE)
        nchars = JSSTRING_LENGTH(*strp);
    if (!JS_XDRUint32(xdr, &nchars))
        return JS_FALSE;

    if (xdr->mode == JSXDR_DECODE) {
        chars = (jschar *) JS_malloc(xdr->cx, (nchars + 1) * sizeof(jschar));
        if (!chars)
            return JS_FALSE;
    } else {
        chars = JSSTRING_CHARS(*strp);
    }

    if (!XDRChars(xdr, chars, nchars))
        goto bad;
    if (xdr->mode == JSXDR_DECODE) {
        chars[nchars] = 0;
        *strp = JS_NewUCString(xdr->cx, chars, nchars);
        if (!*strp)
            goto bad;
    }
    return JS_TRUE;

bad:
    if (xdr->mode == JSXDR_DECODE)
        JS_free(xdr->cx, chars);
    return JS_FALSE;
}

示例#2

文件： jsxdrapi.cpp 项目： Loen-ring/jscoverage-1

JS_XDRString(JSXDRState *xdr, JSString **strp)
{
    uint32 nchars;
    jschar *chars;

    if (xdr->mode == JSXDR_ENCODE)
        nchars = (*strp)->length();
    if (!JS_XDRUint32(xdr, &nchars))
        return JS_FALSE;

    if (xdr->mode == JSXDR_DECODE) {
        chars = (jschar *) xdr->cx->malloc((nchars + 1) * sizeof(jschar));
        if (!chars)
            return JS_FALSE;
    } else {
        chars = (*strp)->chars();
    }

    if (!XDRChars(xdr, chars, nchars))
        goto bad;
    if (xdr->mode == JSXDR_DECODE) {
        chars[nchars] = 0;
        *strp = JS_NewUCString(xdr->cx, chars, nchars);
        if (!*strp)
            goto bad;
    }
    return JS_TRUE;

bad:
    if (xdr->mode == JSXDR_DECODE)
        xdr->cx->free(chars);
    return JS_FALSE;
}

示例#3

文件： jsxdrapi.cpp 项目： Loen-ring/jscoverage-1

extern JSBool
js_XDRStringAtom(JSXDRState *xdr, JSAtom **atomp)
{
    JSString *str;
    uint32 nchars;
    JSAtom *atom;
    JSContext *cx;
    jschar *chars;
    jschar stackChars[256];

    if (xdr->mode == JSXDR_ENCODE) {
        JS_ASSERT(ATOM_IS_STRING(*atomp));
        str = ATOM_TO_STRING(*atomp);
        return JS_XDRString(xdr, &str);
    }

    /*
     * Inline JS_XDRString when decoding to avoid JSString allocation
     * for already existing atoms. See bug 321985.
     */
    if (!JS_XDRUint32(xdr, &nchars))
        return JS_FALSE;
    atom = NULL;
    cx = xdr->cx;
    if (nchars <= JS_ARRAY_LENGTH(stackChars)) {
        chars = stackChars;
    } else {
        /*
         * This is very uncommon. Don't use the tempPool arena for this as
         * most allocations here will be bigger than tempPool's arenasize.
         */
        chars = (jschar *) cx->malloc(nchars * sizeof(jschar));
        if (!chars)
            return JS_FALSE;
    }

    if (XDRChars(xdr, chars, nchars))
        atom = js_AtomizeChars(cx, chars, nchars, 0);
    if (chars != stackChars)
        cx->free(chars);

    if (!atom)
        return JS_FALSE;
    *atomp = atom;
    return JS_TRUE;
}

示例#4

文件： jsxdrapi.c 项目： 2812140729/robomongo

extern JSBool
js_XDRStringAtom(JSXDRState *xdr, JSAtom **atomp)
{
    JSString *str;
    uint32 nchars;
    JSAtom *atom;
    JSContext *cx;
    void *mark;
    jschar *chars;

    if (xdr->mode == JSXDR_ENCODE) {
        JS_ASSERT(ATOM_IS_STRING(*atomp));
        str = ATOM_TO_STRING(*atomp);
        return JS_XDRString(xdr, &str);
    }

    /*
     * Inline JS_XDRString when decoding to avoid JSString allocation
     * for already existing atoms. See bug 321985.
     */
    if (!JS_XDRUint32(xdr, &nchars))
        return JS_FALSE;
    atom = NULL;
    cx = xdr->cx;
    mark = JS_ARENA_MARK(&cx->tempPool);
    JS_ARENA_ALLOCATE_CAST(chars, jschar *, &cx->tempPool,
                           nchars * sizeof(jschar));
    if (!chars)
        JS_ReportOutOfMemory(cx);
    else if (XDRChars(xdr, chars, nchars))
        atom = js_AtomizeChars(cx, chars, nchars, 0);
    JS_ARENA_RELEASE(&cx->tempPool, mark);
    if (!atom)
        return JS_FALSE;
    *atomp = atom;
    return JS_TRUE;
}